Bookmarks are displayed as rectangles in the left margin. You can set as many bookmarks as you want. It is also possible to use numbered bookmarks, which can be easier to navigate if you remember where you put them.
Set and navigate bookmarks
You can use the menu items in the search menu, or the keyboard shortcuts to toggle bookmarks on/off, or navigate between them.
Toggle bookmark on/off Ctrl+F2
Next bookmark F2
Previous bookmark Alt+F2
Toggle bookmark using the mouse
Hold down the ALT key and use the left mouse button to toggle bookmarks on/off by clicking in the left margin.
Clear all bookmarks
Clear all bookmarks from the document.
Delete bookmarked lines
Delete all lines with a bookmark. Can be used to quickly delete several lines at ones. Just be careful...
You can also use numbered bookmarks.
Set bookmark Shift+Ctrl+0..9
Goto bookmark Ctrl+0..9
Set bookmark 4 with Shift+Ctrl+4. Goto the bookmark using Ctrl+4.